Replacing the memory modules (DIMM)

The memory modules are electrostatic-discharge (ESD) sensitive. Take precautions to avoid damage from static electricity.

There are two versions of the SAN Volume Controller 2145-8G4 node: Rev 1 and Rev 2. One difference between these two versions is in the memory configuration. The original version (Rev 1) has eight 1 GB memory modules, while the second version (Rev 2) has four 2 GB memory modules. The label on the Rev 1 node does not include a version number. An additional label on the front of the Rev 2 node includes the version number. Ensure that you have the correct memory modules for the node that you are servicing.

Perform the following steps to replace the memory modules:

Attention: To avoid breaking the retaining clips or damaging the memory module connectors, open and close the clips gently.

With the clips 2 open, lower the memory module 3 into the connector, as shown in Figure 1. Insert the DIMM fully to close the clips.
Figure 1. Replacing a memory module
Replace the top cover on the node.
Replace the node in the rack.
Restore all power to the node.
If a node error between 511 and 515 displays on the SAN Volume Controller model 2145-CF8, 2145-8G4, 2145-8F4, 2145-8F2, or 2145-4F2 front panel, complete the following steps:
1. Use the power button to turn off the node.
2. Remove the power cable from the node.
3. Wait 20 seconds and then replace the power cable.
4. Turn on the node.
5. If the error displays again, the memory bank might be disabled.
  - For the SAN Volume Controller 2145-CF8, 2145-8A4, 2145-8G4, 2145-8F4, or 2145-8F2 node, complete the following steps to enable a disabled memory bank:
    1. Use the power button to turn off the node.
    2. Attach the display and keyboard to the rear panel connectors. No special cables are required.
    3. Turn on the node and press F1 until you the setup menu displays.
    4. Go to the configuration menu, select Memory, and enable the disabled memory bank.
    5. Save the settings, exit the configuration program, and then restart the node.
  - For the SAN Volume Controller 2145-4F2 node, complete the following steps to enable a disabled memory bank:
    1. Order a CT2 cable (part number 00N7004). The cable is a 3-in-1 keyboard, display, and mouse cable that plugs into the C2T OUT port 2 on the rear of the node, as shown in Figure 2.
      Figure 2. SAN Volume Controller 2145-4F2 CT2 IN and CT2 OUT ports
      
      1 C2T IN
      
      2 C2T OUT
    2. Connect the C2T cable to the C2T OUT port with the display and keyboard attached.
    3. Power on the node and press F1 on the keyboard during restart. This takes you into the server BIOS. A message displays that memory bank x is disabled.
    4. Go to the configuration menu in BIOS, select Memory, and use the Tab key to toggle memory bank x from disabled to enabled.
    5. Save the settings and restart the node.
6. If the error displays again, remove and replace the memory module again to ensure that it is seated correctly. If that does not resolve the error, the memory module connector might be the problem. Replace the system board on the SAN Volume Controller models 2145-CF8, 2145-8A4, 2145-8G4, and 2145-4F2, or replace the frame assembly on the SAN Volume Controller 2145-8F4 and SAN Volume Controller 2145-8F2.
Make sure that all cables, adapters, and other components are installed and seated correctly and that you have not left loose tools or parts inside the node. Make sure that all internal cables are correctly routed. If you disconnected the fibre-channel and Ethernet cables, make sure that each cable is reconnected to the same port from which it was removed.
Replace the top cover. See Replacing the top cover.

The procedure to replace the top cover also installs the node in the rack and turns on the node.